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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2321658221984208 5.4514e-08  
a 2.310173820628457 1.3601e-08 AU
q 1.773830416140984 1.2664e-07 AU
i 2.579310429758811 8.8553e-06 deg
node 199.4824737262789 0.00012018 deg
peri 221.281941216853 0.00012227 deg
M 29.76833122790449 2.1655e-05 deg
tp 2456894.448356675375
(2014-Aug-24.94835668)
7.6713e-05 JED
period 1282.523743254936
3.51
1.1326e-05
3.101e-08
d
yr
n .2806965577778316 2.4788e-09 deg/d
Q 2.846517225115929 1.6758e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      625  
   data-arc span      9158 days (25.07 yr)  
   first obs. used      1989-10-03  
   last obs. used      2014-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55624  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:37:45  

Additional Information
 Earth MOID = .787091 AU 
 T_jup = 3.547 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6 mag n/a MPO231562  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla (809)
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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